Short answer
The cost of a root canal in Ontario depends mainly on which tooth is treated, because front teeth usually have one canal and molars have three or more. Other factors include whether a general dentist or an endodontist does the work, whether it is a first treatment or a re-treatment, and the crown or filling needed afterwards. Ask for a written estimate with procedure codes. Workplace insurance and the Canadian Dental Care Plan can each cover part of the cost.
Key takeaways
- Molars usually cost more than front teeth because they have more canals and are harder to reach.
- The final restoration, often a crown on a back tooth, is a separate fee and an important part of the total.
- Re-treating an old root canal is usually more complex and more expensive than a first treatment.
- CDCP covers standard root canals on most teeth without preauthorization, but re-treatment and third molars need it.
If you have been told you need a root canal, the cost is probably one of your first questions. In Ontario there is no single price, because the work involved varies a lot from tooth to tooth. This guide explains what drives the fee, what else to budget for, how insurance and the Canadian Dental Care Plan (CDCP) fit in, and how to compare a root canal with removing the tooth.
What is a root canal, briefly?
Inside each tooth is the pulp, a soft tissue with nerves and blood vessels that runs down through narrow channels in the roots. Deep decay, a crack or an injury can let bacteria reach the pulp, causing inflammation or infection. A root canal treatment removes the damaged pulp, cleans and shapes the canals, and seals them so the tooth can be kept.
Our article on signs you may need root canal treatment explains the symptoms that usually lead to this conversation.
What affects the cost of a root canal in Ontario?
Which tooth it is
The type of tooth matters most, because it decides how many canals need treatment:
- Front teeth (incisors and canines) usually have one canal.
- Premolars usually have one or two canals.
- Molars usually have three or four canals, sometimes curved or very narrow.
Dental offices bill root canals with procedure codes that reflect the number of canals, so a molar is typically the most expensive and a front tooth the least.
First treatment or re-treatment
Re-treating a tooth that already had a root canal is usually harder. The old filling material must be removed, and there may be extra canals that were missed, blockages or curved roots. Re-treatment typically costs more than a first treatment, and in some cases a small surgery at the root tip, called an apicoectomy, is suggested instead.
Who does the treatment
Many general dentists perform root canals, especially on front teeth and premolars. Complex cases, such as curved or calcified canals, re-treatments or molars with unusual anatomy, are often referred to an endodontist, a dentist with specialist training in root canal treatment. Specialist fees are often higher, but the referral can improve the chance of success in difficult cases.
Complexity and extra steps
Calcified canals, a tooth that is hard to isolate, an extra canal, an infection that needs more than one visit, or a large build-up of the tooth before treatment can all add time and cost.
Imaging and exam
X-rays before, during and after treatment are needed to see the root anatomy and confirm the canals are fully filled. Sometimes a 3D scan is recommended for complex anatomy. These are usually billed separately.
Do not forget the restoration afterwards
The root canal is only part of the treatment. After it, the tooth needs a final restoration to seal it and protect it from breaking:
- Front teeth with plenty of healthy structure may only need a filling.
- Back teeth usually need a crown, because they take heavy chewing forces and are weakened by decay and the access opening.
A crown is a separate fee, and for a molar it can be as much as, or more than, the root canal itself. Our article on why a crown may be recommended after root canal treatment explains why this step matters for how long the tooth lasts.
How do insurance and CDCP help?
Workplace and private insurance
Most dental plans cover root canals, either as a basic service or under major services depending on the plan, subject to your annual maximum. Crowns are usually classed as major services, which many plans cover at a lower percentage. Ask your dentist to send a predetermination so you know your share before treatment.
The Canadian Dental Care Plan
Endodontic services, including root canals, are covered under the CDCP when recommended. Under the current benefits guide:
- Standard root canals on front teeth, premolars and first and second molars do not need preauthorization.
- Re-treatment, apicoectomy and root canals on third molars (wisdom teeth) do need preauthorization.
- Crowns need preauthorization and have their own limits.
Your income-based co-payment applies, and you may owe the difference between the clinic’s fee and the CDCP fee. Our CDCP coverage guide explains how the bands work.
Root canal or extraction: which costs less?
On the day, an extraction usually costs less than a root canal. But the comparison is not finished there. A missing tooth can let neighbouring teeth drift and opposing teeth over-erupt, and it can make chewing harder. Replacing it with an implant, a bridge or a partial denture often costs more than saving the tooth, and some of those options are not covered by every plan.
Sometimes extraction is the better choice, for example when a tooth is cracked through the root or has too little healthy structure left to restore. Our article on root canal treatment vs extraction walks through the decision.
How long does a root canal last?
A well-done root canal followed by a good restoration can last for many years, often for life. Success depends on several things: how thoroughly the canals are cleaned and sealed, how quickly the tooth gets its final crown or filling, how much healthy tooth structure remains, gum health around the tooth, and whether you grind your teeth. Delaying the final crown on a back tooth is one of the most common reasons a treated tooth later cracks.
That is why it is worth thinking of the cost as an investment in keeping the tooth. Regular checkups let your dentist monitor the treated tooth with X-rays and spot any problems early.
How to get an accurate estimate
Ask the office for a written estimate that lists:
- The procedure code for the root canal, which shows how many canals are planned
- Any X-rays or scans
- The planned build-up and final restoration, such as a crown
- Whether a referral to an endodontist is recommended
- What your insurance or CDCP is expected to pay, and your share
If the treatment is urgent because of severe pain or swelling, your dentist may relieve the pain first by opening the tooth and cleaning out the infected pulp, then complete the root canal at a later visit.
What happens if you wait?
Delaying a needed root canal because of cost is understandable, but infection inside a tooth does not heal on its own. It can spread to the bone, cause a swelling or abscess, and turn a treatable tooth into one that needs extraction. If cost is a barrier, tell your dentist. There may be ways to stage treatment or options that fit your budget.
When a treated tooth needs a check
After a root canal, some tenderness when biting for a few days is normal. Contact your dentist if pain gets worse instead of better, swelling appears or returns, a pimple-like bump forms on the gum, the temporary filling comes out, or the tooth feels high when you bite. Years later, new pain, swelling or a crack in the crown are also reasons to have the tooth checked, since early attention can often keep a treated tooth in service.
Root canal care at Regal Heights
At our St. Clair West office, we assess the tooth with an exam and X-rays, explain whether a root canal, a referral to an endodontist or another option makes the most sense, and give you a written estimate before treatment. Learn more about our restorative dentistry, or contact our team if you have tooth pain.
Frequently asked questions
Why does a molar root canal cost more?
Molars usually have three or four canals, sometimes curved or narrow, and they sit at the back of the mouth where access is harder. More canals means more time, more instruments and more materials.
Is a root canal cheaper than an extraction?
An extraction usually costs less on the day. But replacing the missing tooth with an implant, bridge or partial denture can cost more over time, and leaving a gap can let neighbouring teeth shift. Compare the long-term plan, not just the first appointment.
Does the Canadian Dental Care Plan cover root canals?
Yes, endodontic services are covered when recommended. Under current rules, standard root canals on front teeth, premolars and first and second molars do not need preauthorization, while re-treatment, apicoectomy and root canals on third molars do. Co-payments and any difference between the clinic's fee and the CDCP fee may still apply.
Do I need a crown after a root canal?
Back teeth often need a crown because they carry heavy chewing forces and are weakened by decay and access. Front teeth with enough healthy structure may only need a filling. Your dentist will explain the recommendation for your tooth.
Is a root canal painful?
With modern local anesthesia, most people find a root canal feels similar to having a filling. It usually relieves the pain caused by an inflamed or infected nerve. Some tenderness for a few days afterwards is common.
